With severe forming operations , cracks are liable to start at these cementite membranes .

如果成形操作剧烈的话，在那些渗碳体薄膜的地方很容易产生裂纹。

However , the question whether the proeutectoid cementite transformation possess the surface relief effect is still unanswered .

但是对于此种相变是否伴随表面浮凸现象的问题，还未见文献报道。